Pillbox ? does that mean there is a fire arc ? or it just a garssion structer ? or is it a mix garrsion infantry and they active a weapon which is a heavy anit-infantry MG ? but just to through another idea the top would fit for a flak cannon that could be AA or even AT or any other turret or a small fire base motar gun.

No matter whether this will have a heavy weapon or not, the structure will have fire arcs and be able to garrison troops. Thanks for your suggestions, we are considering alternative armaments too, but I can't say for sure what decisions have been made about them yet.